EP 0767160 B1 19990407 - Process for the purification of acetone
Title (en)
Process for the purification of acetone
Title (de)
Verfahren zur Reinigung von Aceton
Title (fr)
Procédé de purification de l'acétone
Publication
Application
Priority
IT MI952032 A 19951006
Abstract (en)
[origin: EP0767160A1] The present invention relates to a process for the purification of raw acetone deriving from processes for the production of phenol acetone, impurity mainly due to cumene, water, aldehydes and methanol, which comprises: feeding the stream of raw acetone coming from the primary fractionation of a plant for the production of phenol/acetone to a first distillation column to which a solution of sodium hydroxide at 2% is also fed; sending the stream at the head of the first column, consisting of acetone, water and cumene to a second column to which the extractive solvent triethyleneglycol is also fed; recovering the practically anhydrous acetone from the head of the second column; feeding the bottom product of the second column, containing triethyleneglycol, water, cumene and acetone to a third distillation column in which an azeotropic mixture of water/cumene is recovered from the head and anhydrous triethyleneglycol from the tail; sending the azeotropic mixture of water/cumene to a decanter in which a water phase is separated, containing acetone, which is recycled to the first column and an organic phase, containing cumene and acetone, which is sent to the primary fractionation. <IMAGE>
IPC 1-7
IPC 8 full level
C07C 45/83 (2006.01); C07C 45/84 (2006.01); C07C 49/08 (2006.01); C07C 45/80 (2006.01)
CPC (source: EP US)
C07C 45/83 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
BE DE ES FI FR GB NL
DOCDB simple family (publication)
EP 0767160 A1 19970409; EP 0767160 B1 19990407; DE 69601994 D1 19990512; DE 69601994 T2 19990805; EA 000053 B1 19980430; EA 199600080 A1 19970630; ES 2131900 T3 19990801; IT 1276823 B1 19971103; IT MI952032 A0 19951006; IT MI952032 A1 19970406; JP 3916702 B2 20070523; JP H09124539 A 19970513; US 5788818 A 19980804
DOCDB simple family (application)
EP 96114605 A 19960912; DE 69601994 T 19960912; EA 199600080 A 19961004; ES 96114605 T 19960912; IT MI952032 A 19951006; JP 26465596 A 19961004; US 71435896 A 19960916